:root {
  --tinta: #1c1c1e;
  --fundo: #ffffff;
  --suave: #6b6b70;
  --linha: #e6e6e8;
  --realce: #8a4b2a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --tinta: #e8e8ea;
    --fundo: #16161a;
    --suave: #9a9aa2;
    --linha: #2c2c32;
    --realce: #d99b6c;
  }
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--fundo);
  color: var(--tinta);
  line-height: 1.65;
  margin: 0;
  padding: 3rem 1.25rem 5rem;
}
main { max-width: 34rem; margin: 0 auto; }
a { color: var(--realce); text-decoration: none; }
a:hover { text-decoration: underline; }
header { margin-bottom: 3rem; }
header h1 { font-size: 1.5rem; font-weight: 600; letter-spacing: -0.01em; margin: 0; }
header h1 a { color: var(--tinta); }
header p { color: var(--suave); margin: 0.35rem 0 0; font-size: 0.95rem; }
ul.indice { list-style: none; padding: 0; margin: 0; }
ul.indice li { padding: 1.1rem 0; border-bottom: 1px solid var(--linha); }
ul.indice h2 { font-size: 1.05rem; font-weight: 600; margin: 0 0 0.2rem; }
ul.indice p { margin: 0.25rem 0 0; color: var(--suave); font-size: 0.92rem; }
time { color: var(--suave); font-size: 0.82rem; font-variant-numeric: tabular-nums; }
article h1 { font-size: 1.35rem; font-weight: 600; margin: 0 0 0.3rem; line-height: 1.3; }
article p { margin: 1.1rem 0; }
.voltar { display: inline-block; margin-top: 2.5rem; font-size: 0.9rem; }
footer {
  max-width: 34rem; margin: 4rem auto 0; padding-top: 1.25rem;
  border-top: 1px solid var(--linha); color: var(--suave); font-size: 0.85rem;
}